test: fix potential done called multiple times issue

Author: jacobheun

.gitignore

@@ -16,6 +16,7 @@ lib-cov
 
 # Coverage directory used by tools like istanbul
 coverage
+.nyc_output/
 
 # Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
 .grunt

test/wantmanager/index.spec.js

@@ -63,14 +63,16 @@ describe('WantManager', () => {
         expect(calls.connects).to.have.length(6)
         expect(calls.messages).to.have.length(6)
 
-        calls.messages.forEach((m, i) => {
-          expect(m[0]).to.be.eql(calls.connects[i])
+        for (let i = 0; i < calls.messages.length; i++) {
+          const m = calls.messages[i]
+          const connect = calls.connects[i]
+          expect(m[0]).to.be.eql(connect)
           if (!m[1].equals(msgs[i])) {
             return done(
               new Error(`expected ${m[1].toString()} to equal ${msgs[i].toString()}`)
             )
           }
-        })
+        }
 
         done()
       })